Control for axminster loom tube frame conveyer systems



R. CONTROL FOR AXMINSTER LOOM TUBE FRAME CONVEYER SYSTEMS F. DION May 10, 1949.

Filed Dec. 18, 1947 3 Sheets-Sheet l 'IINVE'NTOR RAYMOND F. 0/0/v- AT T O R N E Y May 10, 1949.

S R. F. DION CONTROL FOR AXMINSTER LOOM TUBE FRAME CONVEYER SYSTEMS 3 Sheets-Sheet 2 Filed Dec. 18, 1947 IN V ENTO R RAYMOND l-T DION ATTORNEY May 10, 1949. R. F. DION CONTROL FOR AXMINSTER LOOM TUBE FRAME CONVEYER SYSTEMS Filed Dec. 18, 1947 DFIG.5

ATTORN v @EE98 Q Q g Q 93 z INVENTOR RAYMOND DION Patented May 10, 1949 CONTROL FOR AXMINSTER LOOM TUBE FRAME CONVEYER SYSTEMS Raymond F. Dion, Leominster, Mass, assignor t Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application December 18, 1947, Serial No. 792,565

19 Claims.

This invention relates to improvements in the tube frame conveyor systems of Axminster looms and it is the general object of the invention to provide simple means by which a motor can move one part of the system the same distance that another part of the system is moved by the loom during an extended period of weaving.

Axminster looms customarily employ a tube frame conveyor system comprising endless chains to move the tube frames one at a time to a transfer station where they are detached from the system for a tuft forming operation and then returned to the chains. In wide Axminster looms the conveyor system together with its full cornplement of tube frames is very heavy and it is desirable to provide supplemental driving means for the greater part of the system.

In the past this has been done by dividing the system into two tight sections connected by two loose sections, such as wells, and a motor has been provided for driving the tight section comprising the greater part of the system independently of the shorter tight section driven by the pullover mechanism of the loom. To enable the motor to move its tight section the same distance that the pullover mechanism moves its section switches in the wells have been operated by shafts carrying sprocket wheels meshing with the chains and rising and falling as the depth of the wells changed. The wells are not positively driven but vary as to their depth due to the difference in amount of movement of the two tight sections, and for this reason the motor control is not as direct and precise as is desired. Furthermore, two switches have been required for each of the two wells. 7

It is an important object of the present invention to provide two motor controls one of which operates in timed relation with the tight section moved by the pullover mechanism and the other of which is operated by the motor driven tight section, and interconnect these controls in such manner that the motor and pullover shaft will move their respective sections equal distances during an extended period of weaving. Each control includes a single switch closure of which is determined by its tight section, and the undriven wells merely permit slight temporary variations in the amounts of motion of the two tight sections without in any way controlling the motor.

In the description to follow three different forms of the invention are set forth, but all of them operate on the principle of having a normally open motor circuit closed for a brief interval by one switch and continued closed by a second switch until the motor has moved its section the required distance. The preferred form of the invention is adapted for use with new looms, while the modifications show adaptations for new or existing looms. In the first two forms of the invention the controls for the switches move in timed relation with relatively large sprocket wheels which mesh with and are either moved by or move their respective tight sections of the chains at the sides of the conveyor system. The second modification uses an idler sprocket wheel similar to those customarily employed but having a number of teeth aliquotly divisible by the number of teeth on the driving sprocket wheel of the pullover shaft.

In the former systems already mentioned it is necessary when reversing the conveyor system to use reversing switches for the circuits of the stop and go switches in each well in addition to the reversing switch for the conveyor system motor. Such systems use a complicated set of electric circuits for the several switches which must always be coordinated if the conveyor system is to move in the correct direction. It is an important feature of the present invention to provide a simple control circuit which eliminates all of the previously used reversing switches except the one for the motor.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein three forms of the invention are set forth,

Fig. 1 is a side elevation of an Axminster loom equipped with a tube frame conveyor system having the preferred form of my invention applied thereto,

Fig. 2 is an enlarged front elevation of the upper part of the conveyor system looking in the direction of arrow 2, Fig. 1,

Fig. 3 is a vertical section on line 33 of Fig. 2,

Fig. 4 is a diagrammatic view of the electric circuits used with the invention,

Fig. 5 is a view similar to Fig. 3 but on a smaller scale and showing the first modification of the invention,

Fig. 6 is a horizontal section on line 6-6 of Fig. 5 on an enlarged scale,

Fig. 7 is a view similar to a portion of Fig. 1 on an enlarged scale showing the second modification of the invention,

Fig. 8 is an enlarged front elevation looking in the direction of arrow 8, Fig. 7, and

Fig. 9 is a diagrammatic view showing a variation in the relation of the tappets for the first and second forms of the invention.

Referring particularly to Fig. 1, the loom L has a tube frame chain pullover mechanism including a shaft l which extends across the loom and has secured thereto sprocket wheels ll one of which is shown. The pullover shaft is rocked periodically either forwardly or backwardly under control of a handle l2 which when raised permits a lever l3 to give angular movements to the shaft in a counter-clockwise direction. When the handle is lowered an upper lever M rocks the shaft periodically but in the opposite direction. When the handle 12 is in neutral position the shaft iii remains stationary during loom operation.

Power for turning the shaft if! is derived from a bottom shaft l turned by a loom motor LM during loom operation and having secured thereto a cam 16 which rocks a lever I! preferably at three-pick intervals when the loom is weaving three shot AXminster fabric. This lever IT is connected by rods I8 to the aforesaid levers l3 and M so that the pullover shaft operates in timed relation with the loom and has periods of rest between its rockings corresponding to the tuft forming operations of the loom.

The conveyor system C comprises two endless chains 20 and 2| between which extend a series of tube frames 22 made in the usual manner. These chains are trained over a series of sprocket wheels some of which drive and others of which are driven by the chains. Framework F extending upwardly from the loom supports a horizontal driving shaft 25 to which are secured worms 26, 2'1, 28 and 29 to rotate worm wheels 30, 3|, 32 and 33, respectively, fastened to cross shafts 35, 36, 31 and 38, respectively. These cross shafts are mounted for rotation on the framework F and each shaft has secured thereto a pair of chain driving sprocket wheels. Fig. 1 shows only the sprocket wheels at the near side of the loom, and these are of the same size and are indicated at 40, 4|, 42 and 43.

That part of the conveyor system extending from sprocket wheel 42 to the right over shaft 35 and then to the left to sprocket wheel 43 may be considered the upper or top tight section TS and comprises the greater part of the weight of the conveyor system. This section is kept tight by means of idler sprockets 45 mounted on the frame F, and other idler sprockets 46 support the upper part of section TS. In actual practice the conveyor system. will be somewhat larger than that indicated at the right of Fig. 1 and may comprise several depending loops in addition to the two shown.

The conveyor system comprises a second and much lighter tight section indicated at PS under control of the sprockets II on the pullover shaft IE1 and moved periodically by the latter independently of section 'TS. This tight section PS extends under the sprockets on the pullover shaft and has rear and front upwardly extending parts trained over right and left sprocket wheels 48 and 49 secured to shafts 50 and 5|, respectively. These last named shafts turn freely in bearings on framework F and do not have driving relation with shaft 25. A small synchronizing chain 52 is trained around sprockets 53 and 54 secured respectively to the shafts '5'!) and 5| and requires the latter and their sprockets to turn in unison and in the same direction. A guide or supporting sprocket 55 maybe mounted on the framework F to the right of the sprocket 4'8.

The conveyor system is formed with front and back wells or slack sections WI and W2, respectively, which permit a limited amount of independent movement of the tight sections with respect to each other. It is to be understood that the tight section PS and sprockets (is and 49 move periodically with the pullover shaft H), but the other and larger tight section TS does not move in exact timed relation with the shorter section PS.

Shaft 25 is driven by means of a normally idle conveyor system motor CM mounted on part of the framework F and having a pinion 58 meshing with a gear 51 secured to shaft 25. The motor CM may have a built-in gear reduction unit not shown but well understood and can be stopped and started to cause intermittent movement of the tight section TS as will be described hereinafter.

The matter thus far described is of known construction in tube frame conveyor systems for Axminster looms and operates in the usual manner. While the motor CM is at rest during loom operation the pullover shaft to will draw chain from one or the other of wells WI or W2, depending upon the direction of its rotation, and from time to time motor CM will run in such a direction as to feed chain into the well from which chain is being drawn by the pullover shaft.

The present invention relates more particularly to means for determining the times of operation of the motor CM and includes two control .means each of which moves in timed relation with its tight section and controls the closing and opening of a motor circuit in such order as to enable the motor to move its tight section TS a distance equivalent to the movement of the shorter tight section PS produced by the pullover shaft.

Referring particularly to Fig. 3, which shows the preferred form of the invention, shaft 38 is extended beyond framework F and provided with disk 653 having a hub 6| secured to the shaft as at 62. This disk is provided with two cam tappets and 66 for control of an electric switch 51 mounted on framework F and normally kept open by one or the other of the tappets. The rotary control disk 6E3 therefore turns in timed relation with the upper larger tight section TS of the conveyor system which by its movement determines opening and closure of the switch 61.

Shaft 5| also extends beyond framework F and has secured thereto a disk Iii similar to disk Bi! and having a hub ll held to the shaft as at '52. This disk is provided with tappets i5 and 15 for the control of a normally Open switch 11 mounted on the framework F. The rotary disk it is therefore seen to be controlled by the tight section PS and is moved in timed relation with the latter to control closing and opening of switch '51.

In the operation of the preferred form of the invention it may be assumed that the loom is running three-shot and tappet B5 is holding switch 6'! open and that disk ii! is having periodic movements in the direction of arrow a, Fig. 3, but with both tappets 15 and 15 spaced from switch H so that the latter is open. As weaving continues, the motor CM and section TS being at rest, tappet '35 will eventually close switch TI, whereupon transformer T will energize electromagnet E to close switch l8 and current from the power lines L, L2 and L3 will flow to the motor CM through a reversing switch 19. As soon as this circuit is closed the motor starts to turn and in doing so revolves shaft 25 so that shaft slightly different distances.

38 turns in the direction of arrow 1) in-Fig. 3 to move tappet 65 away from switch 61, thereupon permitting the latter to close. Switch 61 is in parallel with switch 11 and closes while the latter is still closed.

It is to be understood that disk 19 shifts periodically due to movement of the pullover shaft, and when the latter has its next rocking movement tappet 15 will move from under switch 11 and the latter will open. Switch 61, however, is still closed and electro-magnet E therefore remains energized to keep switch 18 closed. Eventually tappet 66 opens switch 61 to deenergize electro-magnet E and spring 89 opens switch 18 with resultant stoppage of motor CM. The motor runs at such a speed that switch 18 will open before the next closure of switch 11. Since the pullover shaft I rocks every third pick of the loom, tappet 15 is able to hold switch 11 closed long enough to permit tappet 65 to move away from switch 61 and permit the latter to close before switch 11 opens. I

From the closure of switch 11 to the opening of switch 91 the motor moves the top section TS a distance equal to the distance the lower section PS moves between successive closures of switch 11 due to the fact that sprockets 43 and 49 are the same size and have the same angular movements. The motor CM is therefore able to supply chain and tube frames at the rate at which they are advanced by the pullover shaft for the tuft forming operations of the loom. When tappet T6 closes switch 11 the operations already described will be repeated, and motor GM will again move the top section TS until tappet 66 opens switch 61.

In Figs. 3 and the tappets 15 and 16 are not equally spaced around the periphery of the disk 19, and this is also true of tappets 65 and 66 on disk 69. The reason for this unequal spacing is due to the fact that in many Axminster looms as built today sprocket wheels 43 and 49 have an odd number of teeth. In a complete rotation sprocket wheel 49 will therefore come to rest in an odd number of positions in two of which it must be able to close switch 11. As a result of this condition successive closings of switch 11 will occur after intervals of different lengths and the corresponding periods of runnings of the motor will move the top section For a complete rotation of the disks B0 and 10, however, the two tight sections will have the same amount of linear motion, or move through the same distance. loom operation long enough to involve a number of closures of the switches both tight sections of the system will move the same distance.

It will be apparent that the switch of tight section PS closes periodically even though one period may be slightly longer than the other. The tappets of the two sprocket wheels 43 and 49 need not necessarily be spaced as shown in Fig. 3. Disks 69 and 10 are alike, and one of them may be reversed when applied to its shaft. In such an event less than half a turn of sprocket wheel 49 would be followed by more than half a turn of sprocket wheel 43, but at the next operation this relation will be reversed, so that a complete rotation of each of the sprocket wheels would cause two closures of the corresponding switches. Any closure of switch 11 will be followed by a predetermined amount of movement of tight section TS, and the aggregate of the "amounts of such movements will equal the aggre- Over an extended period of weaving or gate of the amounts of the corresponding movements of section PS.

Switch 11 will remain closed for a brief interval corresponding ordinarily to the time between successive rockings of shaft II], but the length of this interval of closure may be varied, so long as it does not continue after opening of switch 61.

The form of the invention already described is of more particular adaptability to new looms, since shaft 5| is ordinarily not as long as shown in Fig. 2, but the first modification is usable on old looms, since it requires no change in shaft 5i. Referring particularly to Figs. 5 and 6, sprocket wheel 43 is shown as having a rim and a web 9| connected by spokes 92. The web has secured thereon two similar cam or switch controlling members 93 and 94 each including a fiat body 95 bolted as at 96 to the web 9I. Extending laterally from each fiat body is a tappet 91, and one or the other of these tappets will ordinarily keep a switch 98 mounted on the framework F in open position. Switch 98 will close unless held open by a tappet 91.

Other members I00 and IIH similar to cams 93 and 94 are bolted to the web I92 of sprocket wheel 49. A second normally open switch I93 is sup-ported in fixed position on the framework F in position to be closed by cams I09 and II.

It will be noted that the cam members on the sprocket wheels 43 and 49 are not diametrically opposite each other for reasons already explained. Sprocket wheel 49 has the same number of teeth as has sprocket wheel 43 and its cams E99 and IIlI are located in the same relative position as are cams 93 and 94.

The operation of the first modification oi the invention is similar to that already described for the preferred form, the only essential difierence being that the cams which operate the switches are not formed as rings or disks but as separate parts which can be applied directly to sprocket wheels of Axminster looms now in existence.

In the second modification shown in Figs. 7 and 8 the switches are controlled by sprocket wheels one of which is preferably twice the size of the other. The sprocket wheel II will ordinarily have six teeth so that one rotation of the pullover shaft II! will move the section PS of the conveyor system a distance equal to a length of chain carrying six tube frames. As shown in Fig. 7 one of the idler sprockets 46 is replaced by a sprocket I I0 having a number of teeth, such as twelve, aliquotly divisible by the number of teeth on sprocket II. Sprocket IIO rotates on a stud l i I secured in a bearing I I2 on the framework Fin a manner very similar to constructions heretofore employed. Turning with the sprocket H9 is a cam disk H4 having two equally spaced tappets II 5 and H6 each capable of opening a switch I I1 supported from the framework F.

A second disk II 8 turns with sprocket wheel I l and has a single tappet I I9 to close a normally open loom supported switch I20 at intervals occurring regularly with each rotation of shaft I0. Fig. 8 shows a bearing member I2I fixed to the loom frame and through which the shaft I9 extends. A collar I22 is secured to shaft ID as at I23, and a screw I24 passes through disk H8 and is tapped into the end of shaft I0. Disk H8 is clamped against collar I22 by a check nut I25 which causes the disk to turn with the pullover shaft.

The operation of the second modification is similar to that already described for the other forms of the invention, except that the motor CM will be called into action at regularly recurring intervals. Tappet III! will hold switch I2!) closed for a brief period corresponding to one rocking of shaft IIl every sixth rocking of the latter to initiate running of motor CM. Switch III will then close and maintain the operating circuit I26 for motor CM closed until section TS has been moved a distance corresponding to six tube frames. Switches III and I2!) are in parallel and jointly control electro-magnet E substantially as already described for the other forms of the invention.

If desired a brake may be used in all forms of the invention to bring the motor CM to rest promptly upon opening of the switch controlled by section TS. Such brakes, which may be of the electro-magnetic type, are well known and are not shown herein. The conveyor system constitutes a considerable load such as is likely to stop the motor promptly after opening of its circuit, and a brake will not be needed in all instances. Furthermore, the tappets corresponding to section TS can be suificiently long to permit several turns of the motor after its circuit opens without opening the corresponding switches.

In all forms of the invention the motor will drive its section TS at a higher linear rate than the average linear rate of section PS derived from the pullover shaft II It is desirable that the switch of section PS open before the switch of section TS opens, and the latter switch should open before the switch of section PS is again closed.

A manually operated master switch I21 controls all the circuits shown in Fig. 4 and when closed will cause running of the loom motor LM. A shipper handle controlled switch I28 will be closed only when the loom is running, hence the conveyor system motor CM cannot run when the loom is idle even though the control switches, such as Ii'I and II, should be closed. The reversing switch 79 may be mounted on the loom and controlled by handle I2, as indicated in Fig. 1. It should be noted that this is the only reversing switch in the circuit. The control circuit for switch I8, designated at I28, may operate at low voltage, and the switches 6!, Ii, 98, I83, III and I20 may be of any approved form.

Should it be desired to move the Whole conveyor system by the motor CM known means not 1 set forth herein may be employed to clutch it to sprocket wheel 49, and lines L, L2 and L3 can be connected in known manner directly to circuit I26 by a manually controlled switch (not shown). When a heading is being Woven between two rugs the handle I2 will be in neutral position and switch 19 will be open and motor GM will not be able to run even though one or the other of the control switches for circuit 529 should be closed at the start of the heading. If desired, movement of handle I2 to neutral could operate connections to open circuit I29, but it is not thought necessary to show such connections.

The description thus far given for the first and second forms of the invention has shown the tappets unequally distributed angularly around the shafts which support them due principally to the fact that most Axminster looms are made with large sprocket wheels having an odd number of. teeth. If sufficicntly long, however, the tappets can be equally spaced even though the sprocket Wheels have an odd number of teeth. Fig. 9 shows a variation of the disks 60 and III of the first form of the invention, but the prin- 'ciples are equally applicable to the tappet members of the second form.

In place of disk Bil I may use a. disk I30 having tappets I3! and I32 equally spaced angularly around the disk, and in similar manner a disk I35 corresponding to disk Ill may have equally spaced tappets I36 and I31. The tappets I36 and It? will be somewhat longer than tappets i5 and it but sufiiciently short to enable a switch Hit for section TS to be closed while switch I39- for section PS is still closed.

In Fig. 9 the switch I39 is shown at the lower end of the full line position of tappet I36, a position which it will assume for one of the stopping positions of the pullover shaft. When this switch is closed the motor will be started. as already described and disk I30 will start to turn so that its switch 38 can close. A given even number of shifts of the pullover shaft will move tappet I31 to the dotted line position shown in Fig. 9 to eifect another closure of switch.- I39, but this time the latter will be near the upper end of tappet I3l'. Tappets i36 and I31 are long enough to permit this relationship. If, for instance, the sprocket wheel id has seventeen teeth the tappets and I3; can each have an angular length equal to one-fifteenth of the circumference of disk I35. After a number of rockings of the pullover shaft equal to the aforesaid given even number plus one tappet I36 will again be in the full line position shown in Fig. 9.

The switch I38 can be open to control circuit 529 when in the same relative position with respect to each of the tappets I3I and I32, and the motor under these conditions will move the tight section TS a distance one-half the distance section PS moves for a complete rotation of disk I35. The wells W and W2 will be deep enough to permit slight differences in the amount of motion of sections PS and TS. Disks I30 and I35 can be made identical, and when the principle set forth in Fig. 9 is applied to the second form of the invention tappet members similar to those shown in Fig. 5 but of a somewhat greater length can be located on a diameter and connected directly to opposite spokes of the sprocket wheels.

The tappets I33 and I3? are found to operate satisfactorily when the disk I35 is reversed.

From the foregoing it will be seen that the invention provides simple means enabling motor CM to move section TS the same distance section PS moves in an extended period of weaving. The motor control circuit uses only two switches which close and open due to movement of the tight sections of the conveyor system. Reversal of the pullover shaft efiects reverse running of the motor CM by shifting switch I9, and this is the only reversal in the control circuits. In the preferred form of the invention two similar cam disks on shafts of the conveyor systems effect closure of normally open switches to control motor CM. The modification uses cam tappets secured to sprocket wheels and is adaptable to Axminsters now in use. The second modification closes a switch by direct movement of the pullover shaft and closes the second switch by an idler sprocket wheel driven by section TS.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In an Axminster loom provided with a tube frame conveyor system having two tight sections movable independently of each other and joined by two slack sections and wherein both tight sections are required to move substantially the same distance during an extended period of weaving, means operated by the loom moving one of said tight sections said distance during the period of weaving, an electric motor operatively connected to the other tight section and having periods of running alternating with periods of stoppage, and electric means controlled by the other tight section causing the motor during the periods of running thereof to move the other tight section said distance during said period of weaving.

2. In an Axminster loom provided with a tube frame conveyor system having two tight sections movable independently of each other and both sections to be moved the same given distance during an extended period of weaving, one tight section moving periodically during loom operation and the other tight section moving when a motor therefor is running, a normally open electric switch for said one tight section closing briefly a given number of times during said extended period of weaving, electric means initiating running of the motor at each closure of said switch, a second normally open electric switch effective when closed to cause said electric means to effect running of the motor as long as the second switch is closed, and means moved by the other tight section determining closing and opening of said second switch and closing the latter prior to and subsequent to opening of the first switch said given number of times during said extended period of weaving to cause the motor to move said other section said given distance.

3. In an Axminster loom provided with a tube frame conveyor system having two tight sections movable independently of each other and both to be moved the same distance during an extended period of weaving, one tight section moving periodically during loom operation and the other tight section moving when a motor therefor is running, a normally open electric switch for said one tight section closing briefiy at intervals during said extended period of weaving, electric means initiating running of the motor at each closure of said switch, a second normally open electric switch effective when closed to cause said electric means to effect running of the motor as long as the second switch is closed, and means moved by the other tight section closing said second switch prior to and after opening of the first switch each time the first switch is closed during said extended period of weaving to cause the motor to move said other section said given distance during said period of weaving.

4. In an Axminster loom provided with a tube frame conveyor chain system having two tight sections joined by two slack sections, one of said tight sections having periodic movements during loom operation to draw chain from one slack section and move chain into the other slack section and the other tight section moving chain into said one slack section and drawing chain from the other slack section when a normally idle electric motor is running, electric means controlled by said one tight section effective after a given linear movement of the latter to start said motor, and electric means controlled by the other tight section effective after the latter has been given a predetermined movement by the motor to stop the latter.

5. In an Axminster loom provided with a tube frame conveyor system having two sections one of which moves periodically and independently of the other section, a normally open electric switch closed briefly after a given amount of travel of said one section, a second normally open switch for said other section, an electric motor 10 effective when either switch is closed to move said other section, and means causing closure of said second switch during closure of the first switch and keeping said second switch closed until the motor has moved said other section a predetermined distance.

6. In driving means for a section of an AXminster loom tube frame conveyor system, a normally idle motor which when running moves said 590- tion, normally open electric circuit means for the motor including two normally open switches closure of either of which causes running of said motor, a rotary member having angular movements closing one of said switches briefly at intervals during loom operation, a second rotary member moved by said section of the system closing the other switch while the first switch is closed and opening the second switch subsequent to opening of the first switch and prior to the next closing of the latter.

7. In an Axminster loom having a tube frame conveyor system provided with two tight sections one of which has periodic movements due to loom operation, a normally open electric switch for each section, an electric motor effective to move said other tight section upon closure of either of said switches, and closing means for each switch moving in timed relation with the corresponding section, the switch for said one section being closed by the corresponding closing means for a brief interval upon completion of a succession of periodic movements of said one section and the other closing means then closing the other switch until the motor has moved said other section a predetermined distance.

8. In an Axminster loom provided with a tube frame conveyor system having two tight sections one of which has periodic movements due to loom operation and the other of which is moved when an electric motor therefor is running, a normally open electric switch for said one section closing periodically during loom operation and when closed causing the motor to run, and a controller including another normally open switch which when closed causes running of the motor, said controller moving in timed relation with said other section and closing the second switch during closure of the first switch and opening said second switch prior to the next closure of the first switch.

9. In an Axminster loom provided with an endless tube frame conveyor chain having two sections one of which moves periodically during loom operation, two sprocket wheels having the same number of teeth, one sprocket wheel meshing with and turned by said one section of the chain and the other sprocket wheel meshing with and when turning causing movement of the other section of the chain, an electric motor which runs and stops alternately during loom operation and when running causes turning of said other sprocket wheel, and electric circuit control means including electric switches closed and opened in timed relation with rotation of the sprocket wheels and causing the motor to turn said other sprocket wheel once for each rotation of said one sprocket wheel.

10. In an Axminster loom provided with a tube frame conveyor system having two tight sections one of which has periodic movements due to operation of the loom, a normally idle electric motor effective when running to move the other section, anormally open electric switch closed for a brief interval after a given number of periodic movements of said one section, electric circuit means causing running of the motor upon closure of said switch, a second normally open switch effective closed to cause running of the motor by said circuit means, and means depend ent upon running of the motor closing said second switch to maintain said electric circuit means closed subsequent to opening of the first switch and opening said second switch after the motor has moved the other section a predetermined distance.

11. In an Axminster loom provided with a tube frame conveyor system having a section thereof moving periodically during loom operation and having a second section movable independently of the first section, a normally idle electric motor which when running causes movement of the second section, normally open electric circuit means which when closed causes running of the motor, two normally open electric switches each effective when closed to close said circuit means, a rotary member moving in timed relation with the first named section of the system and closing one of said switches briefly :at intervals, and a second rotary member moved by the second section of the system following closure of said one switch at one of .said intervals and closing the other of said switches while the first switch is closed and opening' the other switch subsequent to opening of said one switch and prior to the next of said intervals.

12. In an Axminster loom provided with an endless tube frame conveyor chain having two sections one of which moves periodically during loom operation, two sprocket wheels having the same number of teeth, one sprocket Wheel mesh-- ing with and turned by said one section of the chain and the other sprocket wheel meshing n and when turning causing movement of the other section of the chain, an electric motor which runs and stops alternately during loom operation and when running causes turning of said other sprocket wheel, electric circuit control means for the motor including an electric switch for each sprocket wheel, and means turning with each sprocket wheel effective due to turning of the latter to cause opening and closing of the co e sponding switch and causing the electric circcit means to run the motor to effect one rotation of said other sprocket wheel for each rotation of said one sprocket wheel.

13. In an Axminster loom provided with a tube frame conveyor system having two tight sections each to be moved a given distance during loom operation, one of said sections having periodic movements, an electric motor normally idle but effective when running to move the other section of the system, electric circuit means normally open but effective when closed to cause running of the motor, a normally open electric switch for each section, each switch effective when closed to close said electric circuit means, and electric control connections between said tight sections and the switches corresponding thereto causing one of said switches to close after said one tight section has moved said given distance and causing the other switch to close due to closure of the first switch and remain closed until the motor has moved said other tight section said given distance.

14. In an Axminster loom provided with a tube frame conveyor system having two independently movable sections each to be moved a given distance during 100m operation, a sprocket wheel turning when one of said sections moves, a norclosure of said switch after said one section has moved said given distance, a. second sprocket wheel turning when the other section moves, a second normally open switch for the other sec tion, an electric motor moving said other section when either of said switches is closed, and additional means moving with the second sprocket wheel effecting closure of the second switch due to movement of the other section following closure of the first switch and opening said second switch when said other section has moved said given distance.

1-5. In an Axminster loom provided with a tube frame conveyor system having two tight sections one of which has periodic movements due to loom operation and the other of which is moved when an electric motor therefor is running, electric circuit means normally open but effective when closed to cause running of the motor, and two controllers for said electric circuit means, each controller including a, normally open switch closure of either of which closes said electric circuit means, the controller for said one section causing closure of one switch for a brief interval when said one section completes a given amount of movement and the controller of the other section closing th other switch during closure of the first switch, the motor running from the time of closure of the first switch until the other section completes an amount of movement equivalent to said given amount of movement for said one section and then effecting opening the other switch.

1-6. In an nxminster loom provided with a tube frame conveyor system having two tight sections one of which has periodic movements due to loom operation and the other of which is moved when an electric motor therefor is running, a normally open electric switch for said one section effective when closed to cause running of the motor, a second normally open electric switch for the other section effective when closed to cause running of the motor, controller means moved by said one section effecting closure of the first switch at intervals corresponding to a given amount of movement of said one section, and a second controller means moved by the other section effecting closure of the second switch during closure of the first switch and maintaining said second switch closed until the motor has given the other section an amount of movement equal to said given amount of movement and then opening said second switch.

17. In an Axrninster loom provided with a tube frame conveyor system having a Section thereof moving periodically during loom operation and having a second section movable independently or the first section, a normally idle electric motor which when running causes movement of the secend section, normally open electric circuit means which when closed causes running of the motor, two normally open electric switches each elfective when closed to close said circuit means, means moving in timed relation with the first named section of the system closing one of said switches for a brief period at regularly recurring intervals during loom operation, and means moving in timed relation with the second section closing the other switch while the first switch is closed and thereafter opening the second switch subsequent to opening of said one switch after the second section has traveled a distance equal to the distance of travel of the first section occurring between successive intervals of closure of said one switch.

an electric motor therefor is running, normally open electric circuit means effective when closed to cause running of the motor, a normally open electric switch for each of said sections, either switch when closed closing said electric circuit means, two similar rotary switch closing cam means, one cam means for each of said sections, one of said cam means when having a given angular movement corresponding to a given linear movement of said one section closing the switch corresponding to the latter section for a brief period and the other cam means having the same angular movement when the other section has said given linear movement, and means causing said second cam means to close the switch corresponding thereto during closure of the first switch and maintain said second switch closed until said other cam means has said given angular movement.

19. In an Axminster loom provided with a pullover shaft having periodic angular movements during loom operation and provided also with a tube frame conveyor system having two tight sec-. tions movable independently of each other, a sprocket wheel on the pullover shaft moving one of said sections a given distance for each rotation of the pullover shaft, a normally idle electric motor which when running moves the other tight sections, a second sprocket wheel for the other tight section moved by the latter When the motor is running and having a number of teeth aliquotly divisible by the number of teeth on the first sprocket wheel, and electric control means for the motor including a switch for each sprocket wheel causing the motor to start running for each rotation of said pullover shaft and continue running until said other section has moved said given distance.

RAYMOND F. DION.

No references cited. 

